Mathematics Stack Exchange
Mathematics Stack Exchange

Questions tagged [physics]

Questions on the mathematics required to solve problems in physics. For questions from the field of mathematical physics use (mathematical-physics) tag instead.

This tag is for questions on the mathematics required to solve problems in physics and should not be confused with those on physics concepts. Pure physics questions should go in the Physics Stack Exchange. For questions in the field of mathematical physics, please use the tag instead.

5951 questions
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Basic free fall

It takes 0.210 seconds for a dropped object to pass a window that is 1.35 meters tall. From what height above the top of the window was the object released? Air resistance is negligible. I get 1.5 roughly as an answer. What I do is $D =…
John
  • 417
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2 answers

How to set up this vector problem?

Reading through my homework, I encountered this. I don't know what a picture of this would look like, and how to decompose into separate vectors. Once I figure out what I need to decompose into, I can do the rest. Can you help me? A car is…
Rampage
  • 55
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1 answer

Determine Volume V of the figure

Answer: V=848 and m=6.6kg. please help me to solve problem with explanation?
Anzor Bukhrashvili
  • 89
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2 answers

Determining the peak speed of an accelerating/decelerating body between two point

A point moves from point A to point B. Both points are known, and so is the distance between them. It starts with a known speed of VA, accelerate (with known constant acceleration a) reaching VX (unknown), then start decelerating (with known…
ElementalStorm
  • 123
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A ball is thrown, where does it bounce?

Firstly sorry if this has been asked before. I'm trying to work out a simple graphical equation that'll give me the x of the bounce point when y=0 (as it's hit the ground). I'm only after the first bounce and the peak of the second bounce (so…
Ahmed Nuaman
  • 121
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3 answers

What is the runner's average acceleration during the first 4.1s?

A world-class sprinter accelerates to his maximum speed in 4.1s . He then maintains this speed for the remainder of a 100-m race, finishing with a total time of 9.0s. What is the runner's average acceleration during the first 4.1s ? I know that…
Username Unknown
  • 4,633
2
votes
2 answers

How long can a flea stay in the air?

Part A: If a flea can jump straight up to a height of 0.420m , what is its initial speed as it leaves the ground? Answer: $v=2.87$ m/s Part B: How long is it in the air? So I was using the formula $v_f =v_0 +at$, where $a=-9.81$ $m/s^2$, $v_f=0$…
Username Unknown
  • 4,633
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votes
1 answer

Overlap function of three modes

In a physics paper today, I encountered a computation of the overlap of three modes. Here I'm asking what it means to compare three modes (or three vectors or three wavefunctions) in this way. Very often we talk about the overlap of two modes. …
Tobin Fricke
  • 2,381
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1 answer

What is the acceleration of gravity acting on the object?

I appologize if this is worded funny. It's been a while since highschool physics... An object is thrown straight upward with an initial velocity of 1217 pixels per second. Due to the acceleration of gravity acting on the object, after 2 seconds the…
Joncom
  • 145
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2 answers

How to calculate if 2 objects following 2 different arbitrary trajectories will collide?

I would like to know how I can determine if two objects following a trajectory will collide only knowing their position and velocities and acceleration due to gravity. Example 1: A pirate shoots a cannonball from his ship, which we can call "evil…
OGOG
  • 21
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Acceleration to velocity with coordinate $x$

Can someone please help me in finding the formula used to get the answer to this question? An object moves along $x$-axis. In any coordinate $x$, the acceleration is $a=x^4$ (SI units). If the object goes from rest in $x=1$m, what velocity it will…
pedroh
  • 35
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Circular Motion, Vectors and Elasticity

My Doubts: Elastic modulus should be in $N/m^2$ but here it is in Newtons only is this correct or they just mean here $k=30 N/m$ ? What do you want to say about $\lambda = 30 N$ ? Do you think my equations are correct to solve for correct answer My…
learningstudent
  • 1,322
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Circular Motion

A car is driven in a flat circular curve of radius $r$ m. The car’s engine supplies a constant tangential driving force. The car experiences a friction heading towards the centre of the circle. By writing $\ddot{\theta }$ as $\frac{d}{d\theta }\left…
Sigma
  • 21
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1 answer

Math question efficiency

A solar collector has 1000 Btu/min of radiant energy available on a clear sunny day. The collector can transfer 450 Btu/min to a storage tank. What is the efficiency of the system? I used n= energy-output/energy-input *100 I plugged it all in…
Jon
  • 1,920
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Calculate displacement from initial velocity, acceleration, and drag

I am creating a video game, where the drag force of an object is proportional to its velocity. Every object has a mass of $1$ so this is equivalent to a drag acceleration. $$ a_{d} = \ln(1 - k) \times v $$ If the constant $k$ is $0.1$ then, after…
David Callanan
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